Massdrop is about groupbuying something that is too expensive to produce in low quantities, so by buying a bunch of X item as a group buy, the producer or whatever has better opportunities to actually give you value for your items.

I find that for some people living outside the US (like me) getting this kind of stuff from Massdrop is cheaper than buying directly from the vendor website. This would cost me $59.99 + $12.73 ( Total = $72.72 with shipping ) if I order from GeekKeys (I checked). And I'm not counting in the increased price due to customs additional fees and such.

This would cost me less through Massdrop and I am fine with the longer waiting time to get something delivered. I've bought a few things from there before and I have some more stuff coming soon and I never had a problem with Massdrop.

And how is this different than any other keyset group-buy that ran here anyway?

I opened this poll yesterday and the vote count is currently standing at 97 votes, so as you can see there's some interest in bringing these sets over here.